Roller wheel



FIG. 1 is a perspective view of a roller wheel showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a left side elevational view thereof;

FIG. 4 is a top plan view;

FIG. 5 is a right side elevational view thereof; and

FIG. 6 is a front elevational view, with the rear being a mirror imagethereof.

The ornamental design for a roller wheel, as shown and described.